In politics, conventional wisdom can be slow to die, even when the so-called wisdom is neither true nor wise. So I was reminded on a recent visit to Capitol Hill, when I asked several lawmakers and senior members of their staffs to explain the Democrats' timidity about standing up to the National Rifle Association by pressing needed measures to curb gun violence. House Speaker Nancy Pelosi and President Obama tossed cold water a few weeks back on Attorney General... (GunPolicy.org)